package com.lock;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

//第一步 创建资源类
class ShareResource {
    //定义标志位
    private int flag = 1;  // 1 AA     2 BB     3 CC

    //创建Lock锁
    private Lock lock = new ReentrantLock();

    //创建三个condition
    /*
     * c1、c2、c3是为了保持进程之间的同步
     * 而 flag 是为了多线程的时候，产生虚假唤醒
     * */
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    //打印5次，参数第几轮
    public void print5(int loop) throws InterruptedException {
        //上锁
        lock.lock();
        try {
            //判断
            while (flag != 1) {
                //等待
                c1.await();
            }
            //干活
            for (int i = 1; i <= 5; i++) {
                System.out.println(Thread.currentThread().getName() + " :: " + i + " ：轮数：" + loop);
            }
            //通知
            flag = 2; //修改标志位 2
            c1.signalAll(); //通知BB线程
        } finally {
            //释放锁
            lock.unlock();
        }
    }

    //打印10次，参数第几轮
    public void print10(int loop) throws InterruptedException {
        lock.lock();
        try {


            while (flag != 2) {
                c1.await();
            }
            for (int i = 1; i <= 10; i++) {
                System.out.println(Thread.currentThread().getName() + " :: " + i + " ：轮数：" + loop);
            }
            //修改标志位
            flag = 3;
            //通知CC线程
            c1.signalAll();
        } finally {
            lock.unlock();
        }
    }

    //打印15次，参数第几轮
    public void print15(int loop) throws InterruptedException {
        lock.lock();
        try {
            while (flag != 3) {
                c1.await();
            }
            for (int i = 1; i <= 15; i++) {
                System.out.println(Thread.currentThread().getName() + " :: " + i + " ：轮数：" + loop);
            }
            //修改标志位
            flag = 1;
            //通知AA线程
            c1.signalAll();
        } finally {
            lock.unlock();
        }
    }
}

public class ThreadDemo3 {
    public static void main(String[] args) {
        ShareResource shareResource = new ShareResource();

        new Thread(() -> {

            try {
                shareResource.print10(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }, "BB").start();



        new Thread(() -> {

            try {
                shareResource.print5(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }, "AA").start();


        new Thread(() -> {
            try {
                shareResource.print15(1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

        }, "CC").start();

        System.out.println("out");
    }

}
